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A person is watching water waves at the ocean and they notice the peak to peak distance between the waves is 3.4 m. How fast are the waves going
For the reaction: N2(g) + 2 O2(g) ?? 2 NO2(g), Kc = 8.3 × 10-10 at 25°C. What is the concentration of N2 gas at equilibrium when the concentration of NO2 is twice the concentration of O2 g
A transverse traveling wave on a cord is represented by D = 0.25 sin (6.8x + 28t), Determine maximum and minimum speeds of particles of the cord
An automobile having a mass of 1,000 kg is driven into a brick wall in a safety test. The bumper behaves like a spring with constant 5.55 106 N/m, What was the speed of the car before impact
Examining the two components in your mixture below, which component would you expect to come off the column first? Which component will come off the chromatotron first
A child's toy consists of a piece of plastic attached to a spring in the figure below. The spring is compressed against the floor a distance of 2.00 cm, estimate the force constant of the spring
The decomposition of ammonia is: 2 NH3(g) ?? N2(g) + 3 H2(g). If the partial pressure of ammonia is 1.6 × 10-3 atm and the partial pressures of N2 and H2 are each 0.25 atm at equilibrium, what
Which separation technique do you think will be fastest, flash chromatography or chromatotron. Explain.
To fit a contact lens to a patient's eye, a keratometer can be usedto measure the curvature of the cornea-the front surface of theeye. Determine the radius of curvature of the cornea
What is the pH of a solution made by mixing 100.00 mL of 0.20 M HCl with 50.00 mL of 0.10 M HCl. Assume that the volumes are additive.
The pH of a 0.25 M aqueous solution of hydrofluoric acid, HF, at 25.0 °C is 2.03. What is the value of Ka for HF
Let a coil wand pendulum start swinging with an angle of 30 degrees with the vertical. Calculate the heights of the pendulum at the start and final positions
Z- is a weak base. An aqueous solution of NaZ is prepared by dissolving 0.350 mol of NaZ in sufficient water to yield 1.0 L of solution. The pH of the solution was 8.93 at 25.0 °C
You have been visiting a distant planet. Your measurements have determined that the planet's mass is two times that of earth but the free-fall acceleration at the surface is only one-fourth as large
The acid-dissociation constants of phosphoric acid (H3PO4) are Ka1 = 7.5 × 10-3, Ka2 = 6.2 × 10-8, and Ka3 = 4.2 × 10-13 at 25.0 °C. What is the pH of a 2.5 M aqueous solution
Calculate the concentration of bicarbonate ion, HCO3-, in a 0.010 M H2CO3 solution that has the stepwise dissociation constants Ka1 = 4.3 × 10-7 and Ka2 = 5.6 × 10-11
Calculate the pH at the points in the titration of 40.00 mL of 0.425 M NH3 for the reaction below. NH3(aq) + HNO3 NH4+(aq) + NO3?(aq) For NH3, Kb = 1.8x10-5. Enter your answer with 2 decimal places.
Determine the following characteristics of the titration curve for 25.0 mL of 0.400 M NH3(aq) titrated with 0.335 M HI(aq). (For NH3, Kb = 1.8x10-5.) Enter scientific notation as 1.23E4
A "biconvex" lens is one in which both surfaces of the lens bulge outwards. What is the focal length f of this lens in air
If the induced voltage is 0.5 V, as B field is decreasing at a rate of 0.5 T/s in a loop. Calculate the area of the loop
You fly your 15 m spaceship, parallel to the ship's length with a speed of c/3 to your friend. How long is your spaceship as observed by your friend
A 20.0kg light signal hangs from the end of a 7.0m uniform density pole of mass 12.0kg. The pole is free to swivel from the hinge at point A, What is the reaction force (magnitude and direction) at t
A weather satellite encircles the earth at an orbital speed of 6200 m/s. How high above the earth's durface does it orbit
Calculate the minimum amout of work (in joules) required to freeze one liter of water originally at temperature T = 20 degrees celsius
A potter's wheel is a uniform solid disk of diameter 0.72m and a mass of 60kg. the wheel is initially spinning at a rate of 85 rev/min. what is moment of inertia of the disk